Messages in this thread | | | Date | Sun, 13 Apr 2008 22:50:45 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH 1/3] Add prctl commands PR_GET_TSC and PR_SET_TSC |
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> > I think what Erik is trying to do is to make it possible to disable as > many of these in the kernel as possible; I/O is easy, it's off by > default; RDTSC and RDPMC can be disabled in the kernel, and I think > even XSTORE can be disabled.
I'm a little sceptical it will work reliably, but we'll see.
There's also LSL (forgot that earlier). It is used by the vgetcpu() because it's faster than CPUID or RDTSCP. Kernel sets a magic segment up which has different limits for different CPUs.
-Andi
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